Boiler



June 15,1926. 1,589,162' J. S. HILLYER I BOILER Filed May 24, 1924 INVENTOR.

w, r ATTORNEYS.

Patented June 15, 1926.

JAMES S. HILLYER, OF DULUTH, MINNESOTA.

BOILER.

Application filed May 24, 1924. Serial No. 715,705.

My invention relates to steam or hot water boilers and has for its object the provision of an improved boiler of that type for heating or power purposes. It consists of the structures, combinations and arrangements of parts hereinafter described and claimed.

In the drawings, Fig. 1 is a central vertical longitudinal section through one form of my said invention. Fig. 2 is a vertical transverse section of the same on the line AB of Fig. 1. Fig. 3 is a vertical trans-.

verse section on the line C-D of Fig. 1. Fig. 4 is a front elevation of said invention.

In the drawings, 1 is a base of-any suitable material or construction upon which the boiler embodying my invention rests. Said boiler comprises an exterior tank provided with an exterior side shell 2, an interior side shell 8, and opposite end walls or heads i and 5 respectively; an interior tank within said interior wall and spaced therefrom, said interior tank being provided with a side wall 6 and opposite end walls or heads 7 and 8, respectively. Said interior tank is preferably shorter than said exterior tank, the forward end of said exterior tank being preferably arranged to extend a considerable distance forward of the front end of said interior tank whereby a fire chamber 9 is provided in the forward end of said exterior tank.

Said tanks are connected in any suitable manner as by couplings 10 and 11 to provide direct circulation from one to the other.

Extending through each of said tanks are any suitable number of fire fiuesas l2 and 13, respectively.

Said tanks are further connected by any suitable number of water circulation pipes as 14, each of which circulation pipes communicates at one end with the free body of water at one end of said interior tank and extends through one of said fines to the opposite end of said interior tank, thence returns through one of said lines in said exterior tank and discharges into the free body of water in said exterior tank. While any suitable number of said fines and circu1ation pipes may be used, I have, in order to avoid confusion, shown only one of said flues in each of said tanks, and only one of said water circulation pipes.

A smoke chamber and stack 15, of any suitable construction, is provided at one end of said boiler, and a recessed cover 16 of any suitable structure or material is pro vided at the opposite end of said boiler. If desired the outer tank may be provided with a steam dome 17. i

A water feed or supply pipe 18 communicates with said exterior tank, preferably at or near the bottom thereof, and preferably near the forward end thereof. A discharge pipe 19 for steamer hot water communicates in anysuitable manner or piace with said exterior tank preferably at or near the top thereof.

It will. be observed that the space between said tanks is adapted to operate as a fire flue of great area through which the heated gases pass in a thin stream or current from which the heat is rapidly absorbed by said tanks.

Also it Wil. be observed that the water circulation pipes extending through said fire flues compels the gases to flow through said flues in a tubular current from the interior of which the heat is absorbed by said circulation pipe and from the exterior'of which the heat is absorbed by the inclosing-tank or tanks. Thus there is no central strata to the currents of hot gases to retain and carry away and waste the heat.

Any suitable fuel may be used to the said boiler and any suitable apparatus may be installed in said combustion chamber to receive or manipulate or feed such fuel. In the drawings I have shown for this purpose a pile of refractory material as broken brick,

20, deposited upon the floor of said chamber, upon which brick fuel oil is sprayed from a pipe, 21, entering said chamber through its forward end.

It is obvious that said structure may be modified in various particulars within the spirit and scope of certain of my claims.

lVhat I claim is- I. In a boiler, the combination of an ex terior tank, an interior tank extending into said exterior tank and spaced therefrom, connecting means for permitting the circulation of water from one to the other of said tanks, a fire flue extending through one of said tanks, another fire flue extending through the other of said tanks, and a. water circulation pipe extending through both of said fines, one end of said circulation i e communicatinr with the interior of one of said tanks and the opposite end of said circulation pip-e communicating with the interior of the other of said tanks.

2. Ina boiler, the combination of a tank containing a water chamber between its interior and exterior surfaces, a second water chamber extending partly through said tank and spaced therefrom, connecting means for permitting the circulation of water from one to the other of said chambers, a combustion chamber within said tank forward of said second chamber, fire fines ext-ending through the first chamber, other the tines extending through the second chamber, a smoke box and stack for inclosing the forward end of said boiler, and a cover for the rear end of said boiler.

in a boiler, the combination of a tank containing a Water chamber between its 1nterior and exterior surfaces, a second water chamber extending partly through said tank and spaced therefrom, connecting means ior permitting the circulation of water between said chambers, a tire flue extending through .one of said chambers, another the flue extending through the other o1 said chambers, a water circulation pipe extending through both of said fines, said circulation pipe being adapted to communicate at one of its ends with one of said chambers, and at its opposite end with the other of said chambers, a combustion chamber 'ithin said tank, a smoke" boX and stack at one end of said tank, a cover at the opposite end of said tank, a pipe for supplying water to said first chamber, and a discharge pipe for said first chamber.

In testimony whereof, I hereunto attix my signature.

JAMES S. l-HLLYER. 

